请问这首歌是谁唱的？歌名叫什么？

这个我知道啊。叫smile
歌手：tamia 专辑：more
Sometimes I sit at home and wonder how it be if he had loved me truly loved me
Yes, I learned a while ago that kind of thing it never happens for me,
And so I go around and just pretend love is not for me
I play the circus clown around my friends make them laugh and they wont see that
U never let them see u sweat dont want them to think the pain runs deep
Lord know its killing me

So I put on my make up put a smile on my face
And if anyone ask me everything is ok
I'm laughing cuz no one knows the joke is on me
Cuz I'm dyin inside with my pride and a smile on my face...on my face
Singing, la la la, la la, lalala, la la, la la, la la, la la, la la, la la la
Laaaa

Sometimes I sit at home by the phone
Hopin he might call me but he dont call me
But then I realize dreams come true arent for girls like me not like me,
And so I go around with my head